Automatic tapping machine



Jan. 17, 1928.

J. R. SAYLOR AUTOMATIC TAPPING MACHINE Filgd June 29, 923 9 s eets-SheetJan. 17, 1928. 1,656,758

J. R. SAYLOR I AUTOMATIC TAPPING MACHINE Filed June 29, 1923 9sheets-Sheet 5 Jan. 17, 1928.

J. R. SAYLOR AUTOMATIC TAPPING MACHINE Filed June 29. 1925 9Sheets-Sheet 4 Jan. 17, 1928. 1,656,758

J. R. SAYLOR AUTOMATI C TAPPING MACHINE Filed June 29. 1923 9 Sheets-Sheet 5 Jan. 17, 1928. 1,656,758

J. R. SAYLOR AUTOMATI C TAPPING MACHINE Filed June 29, 1923 9 2e e:t 5sheet 6 l i i i Jan. 17, 1928.

J. .R. SAYLOR AUTOMATIC TAPPING MACHINE Filed June 29. 1923 9Sheets-Sheet 7 IWWK" 547/07." fz'fikfhga Jan. 17, 1928. 1,656,758

J. R. SAYLOR AUTOMATI G TAPPING MACHINE Filed u 29, 1923 9 Sheets-Sheet8 ZZqZZ Jan. 17, 1928. 1,656,758

J. R. SAYLOR AUTOMATIC TAPPING MACHINE,

IMW M wfifidg' 7 Patented Jan. 17,1928.

UNITED STATES v 1,656,758 PATENT OFFICE.

JOHN R. SAY-LOB, OF POTTSTOWNJPEN'NSYLVANIA; ELIZABETH E. SA'YLOR,EXECU- TRIX OI SAID JOHN R. DECEASED, ASSIGNOB TO POTTSTOWN' MACHINECOMPANY, OI POTTS'IOWN, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

AUTOMATIC TAPPING MACHINE.

Application filed June 28, 1828. Serial No. 648,526.

My invention relates to automatic machines having particular relation toreaming and tapping machines.

In its broadest aspect, the object of my in- 6 vention is to provide amachine of the class specified which obviates the necessity ofhand-feeding and which is automatically operable continuously to removework from a magazine, to carr the same to a work po- 10 sition, toeffect a esired tapping or reaming operation. and then to discharge thefinished article from the machine.

A more specific object of my invention is to provide a reaming andtapping machine comprising a magazine, a revolubly mounted spindle havina longitudinal component of travel, a chuc means for reciprocating thechuck between points in alignment with the spindle and the receptacle,respectively, means automatically operable to turn the spindle inopposite directions and then to stop the same, means cooperating withsaid last-mentioned means for rendering said chuck-actuating meanseffective only when said spindle automatic means has operated to stopsaid spindle.

Another object of my invention is to provide in a machine of the typespecified clutch mechanism which is characterized by the provision of apair of revoluble members having abutting spaced end portions, one ofsaid members having a lug projecting into the space therebetween, theother member being provided with a recess for the reception of a pin,resilient means for forcing said pin into the space between saidmembers, said lug and pin constituting the connecting elements betweensaid members, and means for with ilrawing said pin from engagement withsaid A further object of my invention is to provide a novel mechanicalcombination adapted for use in reaming and tapping machines, wherein isprovided a movably mounted chuck having relatively movable jaws, togglemechanism operatively associated with one of said movable jaws and withsaid chuck, said mechanism ihaving open and closed positions, where thejaws are spaced maximum and minimum distances, respectoggle mechanism,and means for causing the toggle to assume an open position when tively,actuating means associated with said mediate said spaced guideways, oneof said jaws having a plate adapted to prevent an article moving intosaid discharge opening other than when the latter lies intermediate saidjaws.

A still further object of my invention is to provide a magazine withdischarge apparatus, wherein so-called L-fitti-ngs may be maintained ina desired position to be embraced by the jaws of a movable chuck.

A still further object of my invention is to provide a safety clutchwhich is automatically operable to effect a break in the movable-clutchdrivin mechanism in the event of the jamming o the same.

With these and other objects and applications in mind, my inventionfurther consists in the details of construction and operation andarrangement hereinafter set forth and claimed and illustrated in theaccompanying drawings, wherein Fig. 1 is a side elevational view of myinvention as applied to a machine for tapping fittings, etc., one of thespindle heads and a portion of the driving gearing thereof being shownin longitudinal section on the line I-I of Fig. 2;

Fig. 2 is a front elevational view of the apparatus of Fig. 1;

Fig. 3 is an enlarged, detail, side-elevationa1 view of the magazine,showing the movable chuck in the tapping position, and the means forinsuring the release of the finished article after the chuck jaws havemoved from beneath the cutting tool, the end portion of the movablechuck constituting a resilient mounting for one end portion of thetoggle joint being broken away;

Fi 4 is a view similar to Fig. 3 but showing t e movable chuck in thework-receiving position, wherein the magazine discharge opening ispositioned intermediate the relatively movable jaws of the'chuck;

Fig. 5 is an enlarged, detail, transversesectional view of the magazineand the movable chuck, the sectional plane being taken on the Iine V -Vof Fig. 4;

Figs. 6 and 7 are enlarged, detached, perspective views illustrating theconstruction of the magazine discharge apparatus;

Fig. Sis a sectional detailview of the magazine discharge apparatus slihtly modified to receive L-liftings rather tian T-fittings, as in theprevious figures;

Fig. 9 IS a top plan view of the structure of Fig. 8;

Fig. 10 is an enlarged, detail, side-elevational viewof the gearmechanism for effectin the intermittent operation of the spind es and ofthe movable chuck, a portion of the gear mechanism being shown inlongitudinal section;

Fig. 11 is an end elevational view of the apparatus of Fig. 10;

Fig. 12 is an enlarged, detail, longitudinal-sectional view of theclutch adapted to disengage the chuck-actuating mechanism, andassociated trip levers, the sectional lane being taken on the lineXII-XII of Fig. 13 is a sectional elevation on the line XIII-XIII ofFig. 12;

Fig. 14 is a detail, side elevational view of an alternative arrangementin the chuck actuating mechanism; and

Fig. 15 is a sectional view on the line XVXV of Fig. 14:.

Referring more especially to Figs. 1 and 2 of the drawing,a verticallyupright frame 1 is provided with base flanges 2 which are mounted in areceptacle 3 for receiving such oil as drains from the machine duringthe operation thereof. A front end of the machine has secured thereto anangular faceplate 4 havin an outwardly extending cylindrical portion 5defining a space 6 and a laterally extending flange portion 7, thelatter being provided with a smooth sliding surface 8 having a keyway 9provided with an enlarged base porton 11.

A series of spindle heads 12, the number of which depends upon thenumber of holes to be simultaneously tapped or bored, compriselongitudinally extending cylindrical portions 13 and integral flangeportions 14 and 15. The integral flange portions 14 and 15 are providedwith plane surfaces adapted to slide over the face-plate surface 8 andare secured thereto in any desired position by studs 16 having one endthereof provided with head portions positioned in the annular recess 11and the other end portion engaged by clamping nuts 17.

The cylindrical portion 13. Fig. 1, of the spindle heads 12 are providedwith longitudinally extendin perforations 18 which are partially closeat opposite ends by inner and outer sleeves 19 and 21, respectively. Theinner sleeve 19 has rigidly secured thereto a ring 22 which is mountedin a recess 23 provided in the cylindrical portion 13 of the spindleheads 12, thereby reventing longitudinal movement of the s eeve 19. Theend of the sleeve 19 terminates in a bevel-gear wheel 24, which mesheswith a cooplerating bevel gear wheel 25 positioned in t e space 6defined by the cylindrical wall 5 and rigidly secured to an end portion26 of a horizontally extending driving shaft 27. The remaining endportion 28 of the drivingshaft 27 is associated through selectivelyoperated reversing mechanism 29, Fig. 10, which is partially containedin a gear box 31, with a vertical driving shaft The latter isoperatively associated with a main-driving pulley wheel 33 throughmechanism, of Well-known design, which is contained in a change-gear box3 1, all as will be explained more fully hereinafter.

The outer end of the remaining sleeve 21 is provided with a flangeportion 35 which is rigidly secured in position by a releasable clampmember 36. The sleeve 21 is further provided with a master thread whichmeshes with a correspondingly threaded portion 37 on the outer endportion of a spindle 38. The inner end portion of the spindle 38 issplined to the revoluble sleeve 19 and it may he provided with a tap 39or other cutting tool, as desired. The periphery of the flange 35 isprovided with grooves 41 adapted to receive a shoulder portion 42 of" ahinge locking clip 43, whereby slight adjustments may be made in therelative position of the threaded portions of the spindle 38 and thesleeve 21. The mechanical strength of the locking clip 43 is such that,in the event of the jamming of the spindle 38, or other excessive strainon the driving mechanism connected' therewith, the clip 43 will break.thus relieving the strain.

In the operation of the spindle-head mechanism just described. when theshaft 27 is driven in one direction, the driving gearwheel 25 is rotatedto correspondingly revolve the cooperating gearwheels 24, which arerevolubly mounted in the several spindle heads 12, thereby causing theturning of the spindles 38. The rotation of the several spindles 38 orrather the relative movement of the threaded portions of the sleeves 21and the spindles 38. incident to the turning of the latter, causes thespindles 38 to have a longitudinal component of travel as well as therotatable component just mentioned. Hence the several taps 39 may bemoved inwardly or outwardly depending upon the direction of rotation ofthe driving shaft 27.

The reversing mechanism 29. of which Figs. 10 and 11 are particularlyillustrative,

is so designed as to cause the several spindles 38 to effect a forwardand return movement only. The reversing mechanism 29 for carrying thisdesired result into effect comprises a vertically-positioned drivingshaft 32 carrying spaced gear-wheels 44 and 45 which 'mesh withcooperating bevel gear-wheels 46 and 47, respectively, keyed to thehorizontal driving shaft 27. The bevel gear-wheel combination 44, 46causes the horizontal driving shaft 27 to be rotated at a faster speedthan the bevel gear-wheel combination 45, 47 by reason of the highergear ratio in the former combination as compared to that in the latter.

Adjacent faces of the gear-wheels 44 and 45 are provided with teeth 49and 51. respectively, which are adapted successively to engagecooperating teeth 52 and 53. respectively, formed on the opposite endportions of a clutch sleeve 54 slidablv mounted on the vertical drivingshaft 32. The clutch sleeve 54 is provided with an arm 55 which isrigidly secured to a vertically movable shift rod 56. The lower endportion of the shift rod 56 extends through a perforation 57 in the rearend portion of the machine frame 1. to a point near the base thereof.

The shift rod 56 may be held in a neutral position, where the clutchsleeve 54 is out of engagement with either of the driving pinions 44 and45, or in forward or reverse positions, where the clutch sleeve 54 is inengagement with the driving pinion 45 or 44. respectively, by providinga portion 58 of the shift rod 56, which extends through the perforation57, with grooves 59. 61 and 62 which correspond respectively to theseveral positions just mentioned. A stop member 63 is positioned in aperforation 64 formed in a projecting lug portion 65 of the machineframe 1. and it is normally held in engagement with one of the groovesby a spring 66. the force thereof being adjusted by a member 67.

The driving pinion 44 is provided with a depending annular sleeve 68which is mounted in a perforation 69 positioned in axial alignment withthe vertically-extending shaft 32 and has an open end portion thereofprovided with a collar 71. The lower end of the vertically-positionedshaft 32 rests upon a thrust bearing 72. which, in turn, is mounted onthe upper end of a vertically-positioned shaft 73 splined to the sleeveportion 68 of the driving pinion 44. A collar 74 may be rigidlv securedto the portion ofv the shaft 73 just beyond the collar 71. A worm 75 ismounted on the lower end of the shaft 73 and it cooperates with a wheel76 which is rigidly mounted on a horizontally-extending shaft 77 mountedin bearings 78 and 79 formed on the side of the main machine frame 1.

The shaft 77 may be extended toward the front end of the machine andmounted in a bearing 80, Fig. 1, which is-carried by the 011 dramage box3, the extreme end portion of the shaft 77 being formed to provide anadjusting head- 81, for reasons as will appear more fully hereinafter. Arear endportion of the shaft 77 is provided with oppositely-directedlever arms 82 and 83, the end of the former being mounted in a recess84in the lower end portion of the clutch rod 56, whereby the rocking ofthe shaft 77 effects a reciprocating movement of the clutch rod 56. Thelever arm 83 carries a counter weight 85.

The worm-wheel 76 may be provided with a projectmg portion constitutinga face plate 86. A pair of dogs 87 and 88 are adjustably secured to theface plate 86 by bolts 89 which are positioned in an angular recess 91formed therein. In Figs. 10 and 11. the dog 87 is so positioned that itactuates the clutch sleeve 54 out of engagement with the bevelgear-wheel 44 to prevent further outward movement of the taps 39. Thedog 88 is so positioned that its actuated into engagement with the lever82 to move the clutch sleeve 54 out of engagement with the gear-wheel 45and into engagement with the gear-wheel 44 when the spindles 38, Fig. 1,have completed their working stroke.

In operation, when the clutch sleeve 54, Fig. 10, is actuated intoengagement with the bevel gear-wheel 45 by means hereinafter to bedescribed. the vertically-positioned driving shaft 32 is directlyconnected to the bevel gear-wheel 25 through the bevel gearwheels 45 and47 and the shaft 27, thereby causing the taps 39 to move from theiroutermost position to their innermost position. As the taps 39 are movedinwardly, the wheel 76 is also turned by reason of the operativeconnection between the shaft 73 and the sleeve 68 and also that betweenthe bevel gear-wheels 44 and 46, respectively. The turning of the faceplate 86, incident to the forward movement of the taps 39, causes thedog 88 to be actuated into engagement with the lever 82 when the taps 39have reached their most forward position, thereby moving the clutch rod56 downwardly.

The movement of the clutch rod 56 is such as to cause the clutch sleeve54 to be actuated out of engagement with the bevel gearwheel 45 and intoengagement with the bevel gear-wheel 44, thereby reversing the operativeconnection between the shaft 32 and the shaft 27 and causing the taps 39to be moved outwardly.

The reversal in the direction of movement of the taps 39 causes acorresponding reversal in the direction of movement of the face plate 86and this movement continues until the dog 87 has been actuated intoengagement with the arm 82 to cause the clutch rod 56, to be actuatedupwardly. The uplit) ward movement of the latter causes the clutchsleeve 54 to be actuated out of engagement with the bevel gear-wheel 44into the neutral position shown In F 1g. 10 of the drawing. Ashereinafter stated, when the clutch sleeve 54 has assumed the neutralposition, the taps 39 have completed their return stroke.

In Fig. 1, a bracket 92 is shown secured to a lower portion of the faceplate 4 and it is provided with a vertically adjusting screw operatingin a manner understood by those skilled in the art. The top side of thebracket 92 is provided with an undercut rib 93, Fig. 5, which serves asa slidable mounting for a movable chuck 94. The latter comprises astationary jaw 95 on the end thereof immediately adjacent to the faceplate 4 and a resilient abutment construction 96 on the outer endthereof. Inasmuch as the details of the resilient abutment construction96 have been previously described in my Patent No. 1,089,273, datedMarch 3, 1914, a detailed description is deemed unnecessary. Acooperating movable jaw 97 may be slidably mounted for longitudinalmotion on ways 98 formed .on the top side of the movable chuck 94. Abell-crank lever 99 is pivotally mounted on the movable jaw 97 and ithas one end thereof connected by a link 101 with the resilient abutment96. The movable jaw 97 may be provided with an extension 102 for reasonsas will appear hereinafter.

A slotted arm 103, Figs. 3 and 4, engages a pin 104, which is carried bythe remaining arm of the bell-crank lever 99, whereby the movable chuck94 and the relatively movable jaw 97 may be actuated, as will beexplained more fully hereinafter. A pair of adjustable lugs 105 and 106,which are mounted on the movable chuck 94, cooperating with a pin 107,which is carried by the bracket member 92, serve to limit the forwardmovement of the movable chuck 94 to a point where such work as may becontained between the jaws 95 and 97 is in alignment with the taps 39,as shown in Fig. 1, and the reverse movement to a point where the jaws95 and 97 are in alignment with the discharge opening of a workmagazine, 108, as shown in Fig. 4.

The work magazine 108, Fig. 5, which in this particular instance hasbeen designed to receive and to discharge T-fittings, comprises aplurality of vertically-extending guide strips 10.9 which are mounted ona plate 111 supported by side plates 112 and 113 rigidly secured toopposite sides of the bracket 92. The supporting plate 111 is providedwith a central opening 114 through which the T-fittings are adapted topass into a discharge structure 115, which is positioned in the path oftravel of the movable clutch 94, whereby the movable jaws 95 and 97 mayembrace and remove a fitting therefrom.

The discharge structure 115, of which Figs. 6 and 7 are detailperspective views an Fig. 5 is a side elevational view of the completedstructure, comprises a pair of spaced extensions 116 and 117 of thestrips 109 and base members 118 and 119, respectively, the extensions116 and,117 constituting guideways for the fittingsas they leave themagazine 108 and move into the chuckengaging position shown in Fig. 4.The base members 118 and 119 comprise longitudinally-extending membershaving horizontal and vertical sides 121 and 122, respectively, thelatter being rigidly positioned in recesses 123 in the extensions 116and 117 and constituting continuations of the guideways formed by saidextensions. The horizontally-extending sides 121 are provided withspaced perforations 124 adapted to removably receive centering pins 125which are carried by plate members 126.

The plate members 126 are held in position to cause the severalcentering pins to extend up through the corresponding perforations bymeans of strips 127 having base portions 128 secured to plate members126 and vertically extending portions 129 secured by springs 130 to theextensions 116 and 117.

The construction shown in Figs. 8 and 9 has been modified to provide forthe centering of L-fittings rat er than T-fittings as just described anddifferentiates over that of Fig. 5 in the provision of a shoe 131 forguiding the L-fittings as they pass from the magazlne opening 114 into adischar e structure 132. The modification in the discharge structure 132comprises the shortening of one of the extensions, say 116, and themounting of a perforated plate 133 directly in the surface thereof. Thecentering pins 125 may be resiliently held in the perforations of theplate 133 by the force of the springs 130. The construction hereinemployed is otherwise the same as that just described in connection withthe discussion of Figs. 6 and 7.

Further precautions may be observed to properly center the work, otherthan those effected by the resiliently mounted centering pins 125, asthe jaws 95 and 97 are about to embrace the same, by providing said jawswith outwardly extending centering springs 134, as shown for instance inFig. 4, where the springs 134 are extended, or in Fig. 3, where thesprings 134 are compressed.

Referring to the chuck-actuatin mechanism shown more particularly inigs. 1, 3 and 40f the drawings, the arm 103 is keyed to an actuatingshaft 135 having an arm 136 at the outer end thereof. The rocker arm 136is slotted for the reception of a in 137 which provides a pivotalmounting or one end of a connecting link 138, theother end of which ispivotally mounted to the end portion of a lever arm 139 keyed to ahorizontallyositioned shaft 140.

The ot ier end of the rocking shaft 135 carries a crank 141 which isoperatively associated by means of a link 142 with a ocking pin 143. Thelatter is reciprocally mounted in a boring 144 in the bracket 92 and itis adapted to be reciprocated by the link 142 into and out of the pathof a lug 145 mounted on the movable clutch 94.

The end of the link engaging the pin 143 is slotted, thereby providingfor the relative movement of the link 142 and the pin 143, while aspring 146, which is contained in the boring 144 between the basethereof and the pin 143, normally forces the latter to its outermostposition, as shown in Fig. 3. One corner of the lug 145 is formedsquare, while the opposite corner is formed with a bevel surface 147 forreasons as will appear more full hereinafter.

T e arrangement of the crank 141 and the link 142 is such as to causethe pin 143 to engage the lug 145 to lock the chuck 94, when the jaws 95and 97 thereof have moved from the position of Fig.3 a distancesuflicient to bring such finished work as is contained therebetween outof alignment with the taps 39. Further motion of the rocker shaft 135causes the arm 103 to move to break the toggle joint formed by thebell-crank lever 99 and the link 101.

The further turning of the shaft 135, however, causes the crank 141 towithdraw the locking pin 143 out of engagement with the square corner ofthe lug 145, permitting the chuck to finally assume the position of Fig.4. WVhen the motionof the chuck 94 is reversed, the bevel surface 147 ofthe lug 145 subsequently engages the pin 143, so "that the latter ismoved downwardly by reason of the slotted connection between the sameand the link 142, permitting the chuck to continue unrestricted in itsmovement to the working position illustrated in Fig. 3. Attention isalso directed to the fact that the movable jaw extension 102 serves topermit articles to enter the discharge structure 115 only when the chuck94 has moved into the workreceiv'ing position.

The laterally-extending shaft 140 is mounted in a bearing 148 formed inthe machine frame 1 and associated through a clutch mechanism 149 with avertical driving shaft 151 having an operative connection with the maindriving pulley wheel 33 through the ear-wheel mechanism contained in thegearift box 34. The clutch mechanism 149 comprises a collar 152 which isrigidly secured to the shaft 140 and which is provided with a forwardlyprojecting flange portion 153. A portion 154 of the shaft 140 extendingbeyond the base portion of the flange 153 is of reduced diameter and itserves to provide a loose mounting for a bevel gear-wheel 155. The endportion 154 may be mounted in a bearing 156 formed in a pedestal 157secured to a side portion of the oil receptacle 3. The end portion 154is provided with projecting lugs 158 and 159 which are designed toextend into the space delined by the projecting flange portion 153.

A key 161 is slidably mounted in one end portion of a groove 162 formedin the shaft 140 and it has an end portion 163 thereof normally held inthe space formed by the flange 153 by means of a resiliently mountedplunger rod 164. The plunger rod 164 has oneend thereof positioned in aboring 165 formed in a member 166 which is mounted in the remaining endportion of the groove 162, and the other end thereof in engagement withthe outer end of the slidably mounted key 161. A spring 167, which ispositioned in the boring 165 between the base thereof and the plungerrod 164, may serve to hold the latter in resilient engagement with thekey 161.

When the key 161 is in the position indicated in Fig. 12, where theinner end thereof projects into the space defined by the flange 153, thehorizontally-positioned shaft 140 is disconnected from thevertically-positioned shaft 151 until the bevel gear-wheel 155 hasturned through such angle as to cause one of the projecting lugs 158 and159, say the latter, to be actuated into engagement with the projectingend portion 163 of the pin 16!, as shown for instance in Fig. 13. Thesubsequent operation of the shaft 151 causes a reciprocating movement ofthe slidable chuck 94 through the linkage mechanism just described.

In order to prevent the movable chuck 94 from being actuated out ofalignment with the spindles 38, when the taps 39 are being movedinwardly to efiect the tapping of the Work carried thereby, I disconnectthe horizontally-positioned driving shaft 140 from thevertically-positioned driving shaft 151 by moving the slidable pin 161out of engagement with either of the lugs 158 or 159. To this end, Iprovide the outer end portion of the pin 161 with avertically-positioned shoulder portion 168 which is spaced from anadjacent side of the collar 152 to provide for the entrance therebetweenof an end portion of a pivotally-mounted wedging lever 169.

In operation, the lever 169 normally rests upon the surface of the shaft140 and it operates to withdraw the key 161 out of enlgagem ent witheither of the lugs 158 and 169 only when the shoulder 168 has beenactuatedinto engagement therewith. When such condition obtains, theoperative connection between the shafts 140 and 151 is broken and thebevel gear-wheel 155 merely revolves loosely upon the shaft portion 154,thereby preventing further movement of the sliding chuck 94. Thedisengagement of the clutch 149 just described occurs when the slidingchuck 94 has been so moyed as to bring the work contained between thejaws thereof into direct alignment with the taps 39. g

A link 171 has the upper end thereof pivotally mounted on thevertically-swinging wedge lever 169 and the lower end thereof inengagement with the end portion of a lever 172 which is mounted on theshaft-77 carrying the clutch-rod operatin lever 82. In practice, thelever arm 171 1s so ositioned that when the clutch sleeve 54 is in theneutral position, the wedging lever 169 is held out of engagement withthe shaft 140, as shown in Fig. 10. When the shaft 77 is rocked, tocause the clutch sleeve 54, Fi 10, to be actuated out of en agement witthe bevel gear-wheel 45 an into engagement with the bevel gear-wheel 44,the end of the lever 172 will have moved downwardly to such extent as topermit the end of the trip lever 171 to engage the top side of theactuating lever 172, as will presently apear.

P The collar 153, Fig. 13, is provided with a projecting portion 173which may be actuated into engagement with a revolubly mounted disk 174carried by the trip lever 17 1, and it operates to move the end of thetrip lever 171 from the upper side of the arm 1T2, thereby permittlngthe wedging lever 169 to fall so that the outer end thereof rests uponthe shaft 140. A spring 175, Fig. 1, has one end secured to the machineframe 1, and the other end to the trip lever 171, whereby the disk 174may be held in resilient engagement with the collar 152. The trip ing ofthe lever 171 may be effected at wil by means of a trip rod 17 6 whichextends from the lever 171 to the front end of the machine, as shown inFig. 1.

The tripping of the lever 171, 'ust described, occurs in that portion oft e cycle of operation of my machine when the taps 39 have been moved totheir outermost position and disconnected from the driving source,through the engagement of the dog 87, Fig. 11, with the clutch-rod leverarm 82, which causes the clutch sleeve 54 to be actuated out ofengagement with the bevel gear-wheel 44.

Furthermore, the operative connection between the horizontallypositioned shaft 140 and the vertically ositioned drivin shaft 151 ofthe sliding c uck driving mec anism is not disturbed inasmuch as the wede lever 169 is resting on the shaft 140. e end portion of the wedgelever 169, Fig. 12, is not brought into engagement with the shoulderportion 168 of the pin 161 to disenga e the clutch 149 until the shaft140 has ma e one complete revolution, during iwhich interval of time,the sliding chuck from the work position to the work-receivin positionand return. 1

In order to render effective the tap-actuating mechanism, when theslidin chuck 94 has moved into alignment with t e taps 39, I provide acam 177 on the shaft 140 which cooperates with a roller 178 carried by alever arm 179 mounted on the shaft 77. In operation, the cam 177 enga esthe lever arm 179, onl when the mova le chuck 94 is in the wororso-called tap ing: sition and it operates to move the c utc 5 eeve 54from the neutral position shown in Fi 10 to the work position, whereinsaid clutc sleeve 54 is in engagement with the bevel gear wheel 45.

Experience has shown that the operation of the mechanism embodying myinvention is greatly improved by exerting a braking effect on thehorizontally-positioned check shaft 140. To this end, I have mounted amanually adjustable brake 181, Fig. 12, of usual design on the reducedportion 154 of the shaft 140.

In order to insure the interru 'tion of the chuck-driving mechanism, int e event of the jamming of the same, I provide asafety clutch 182 onthe vertically-positioned driving shaft 151. The shaft 151 is brokenalong the line 183, one end thereof being provided with a collar 184having a recess 185. The other end is provided with a slidably mountedcollar 186 having a depending tongue portion 187 adapted to engage therecess 185, whereby the two shaft portions may be operative yassociated. The collar 186 is normally held in resilient engagement withthe collar 184 by means of a spring 188 which is interposed between theclutch collar 186 and an abutment 189 on the shaft 151. A hand lever191, which is pivotally mounted on the machine frame 1, is secured tothe movable clutch collar 186, whereby the operative connection betweenthe two portions of the shaft 151 may be manually interhas moved rupted.A catch member 192, which is V mounted on the gear casing 31, Fig. 1,may be employed to retain the lever 191 in a desired shaft-disengagingposition.

Assuming the apparatus in the general position shown in Figs. 1 and 3 ofthe drawing, movement of the sliding chuck 94 from the tapping position,wherein the work contained between the jaws 95 and 97 is in directalignment with the taps 39, is prevented by the wedge lever 169 whichhas moved the slidable clutch pin 161 out of engagement with one of thelugs 158, 159. Attention is directed to the fact that operation of thever ticall -positioned driving shaft 151, with the clutc 149 in thedisengagin position, is effective only to turn the beve gear-wheel 155which is mounted loosely on the reduced portion 154 of the chuck-drivingshaft 140. In

the foregoing position of the driving apparatus, the end of the triplever 171 engages a the side of the lever 172.

Moreover, the clutch sleeve 54 is in en-,

gagement with the bevel gear-wheel 45, thereby causing the spindles 38to revolve in such direction that the same are moved inwardly. Theinward movement of the spindles 38 continues until the work has beenoperated on to the desired extent, whereupon the direction of rotationof the spindles 38 is reversed to move the taps 39 out of the-work at anincreased speed. The outward movement of the taps 39, just mentioned, isbrought about by the actuation of the dog 88, F lg. 11, into engagementwith the lever arm 82 through the operative connection of the drivingmechanism comprising the wormwheel mechanism 75, 76, the bevelgearwheels 44, 46 and the driving bevel gearwheels 45, 47, with thedriving shaft 32.

The actuation of the dog 88 into engagement with the lever arm 82 movesthe clutch rod 56, Fig. 10, downwardly and, as a consequence, the clutchsleeve 54 is moved out of engagement with the bevel gear-wheel 45 andinto enga ement with the bevel gearwheel 44, there y reversing thedirection of rotation of the spindles 38.

The downward movement of the lever arm into engagement therewith,effects a corresponding downward movement of the lever 7 arm 172, Fig.12, thereby permitting the trip lever 171 to swing from the positionshown in Fig. 1 to a position wherein the end of the trip lever 171 isdirectly over the upper side of the end portion of the lever 172.

The outward movement of the taps 39 is interrupted, when the same havecleared the work contained between the movable jaws 95 and 97, throughthe actuation of the dog 87 into engagement with the lever ,arm 82,thereby moving the clutch sleeve 54 out of engagement with the bevelgear-wheel 44 into the neutral position shown in Fig. 10, where theoperative connection between the spindles 38 and thevertically-positioned driving shaft 32 is interrupted.

The upward movement of the lever arm 82, incident to the actuation ofthe clutch sleeve 54 into the neutral position, causes a correspondingupward movement of the lever arm 172. Inasmuch as the end of the triplink 171 is in engagement with the top side of the lever arm 172, theupward movement of the same causes the wedge lever 169 to be moved outof engagement with the slidably mounted pin 161, thereby permitting anoperative connection to obtain between the shafts 151 and 140 of thechuck-drivingmechanism.

When the shaft 140 has turned through'au angle suflicient to actuate theclutch pin 161 from directly beneath the wedging lever 169 on the triplever 171 causing the end thereof to be actuated out of engagementwiththe upper side of the lever 172 into the position shown in Fig. 1.The end portion of the wedge lever 169 is thus permitted to rest on therevoluble shaft 140.

When the chuck-actuatin mechanism is rendered efiective, the slida leclutch 94 is moved from the work position until the lug 145, Fig. 3,engages the cam-operated pin 143. Further movement of the lever arm 103causes the toggle formed by the link 101 and the bell-crank lever 99 tobreak, moving the sliding jaw 97 an amount sufiicient to release thefinished work. When the work has been released, it passes from themachine [through a chute 193, Fig. 5, to a receptacle (not shown).Further motion of the shaft 135 causes the locking pin 143 to bewithdrawn out of engagement with the lug 145 and the movable chuck 94 tobe actuated to a work-receiving position, as shown in Fig. 4.

As the movable jaw 97 and plate 102 are actuated past the outlet opening114 of the magazine 108, a fitting moves into the discharge structure115 where it is in position to be grasped by the jaws of the movablechuck 94, as shown in Fig. 4. Further movement of the shaft 135 causesthe work or fittings to be grasped firmly between the jaws of the chuck94 and moved into the tapping position previousl mentioned.

As the chuc 94 is moved into the tapping position, the cam 177 isactuated into engagement with the lever arm 179 to move the samedownwardly and, consequently, the lever arm 82 upwardly, thereby causingthe sleeve 54 to be actuated from the neutral position into engagementwith the bevel gear-wheel 45. The spindles 38 are thusoperativelyassociated with the drivingishaft 32 in such manner as tocause the same to move inwardly for the tapping operation. Substantiallysimultaneous with the actuation of the clutch sleeve 54 intoengagementwith the gear-wheel 45, the end of the wedge tioned shaft 140.The face of the cam plate 195 is provided with a groove 196 for thereception of a follower element 197 which is revolubly mounted on a link138, as shown in Fig. 14, while the remaining end thereof. is pivotally'mounted on a pin 198 which projects from the end of thehorizontallyposltioned shaft 140. The latter end portion may be providedwith a slot 199, whereby the link 138 may move relative to the pin 198as the cam plate 195 is revolved.

The construction shown in Figs. 14 and 15 further differentiates overthat of the previous. figures in that the brake 181, Fig. 12, which ismountedon the reduced end portion 154 of the horizontally-positionedshaft 140, has been replaced by a brake 201 of usual construction whichis so mounted on a vertical upright arm 202 carried by the oil tank 3 asto frictionally engage the side of the cam plate 195.

- ment of my invention, for the purpose of describing the same andillustrating its principles of construction and operation, it isapparent that various changes and modifications may be made therein,without. departing from the spirit and scope of my invention. I desire,therefore, that only such limitations shall be imposed thereon, as areindicated in the appended claims or as are demandcd by the prior art.

I claim:

1. In combination, a chuck, means for causing said chuck to move througha complete forward and return stroke and then stop, a spindle, means forturning said spindle in opposite directions and then stopping the same,and means for interconnecting said first and second-mentioned means,whereby the latter may be rendered effective to start said spindle whenthe former is rendered ineffective to stop said chuck.

2. In combination, a chuck, means for causing said chuck to move througha complete forward and return stroke and then stop, a spindle, means forcausing said spindle to have a desired stroke and then come to rest, andmeans for interconnecting said first and second-mentioned means, wherebythe former may be rendered eifective to start said chuck when the latteris rendered inefi'ective to stop said spindle.

3. In combination, a magazine, a spindle, a chuck, means forreciprocating the chuck intermediate said magazine and said spindle,means for causing said spindle to turn in opposite directions and thenstop, and means interconnecting said first and secondmentioned meansautomatically operable ,to render ineffective one actuating means whilethe other efiective. 4. In combination, a magazine, a spindle, a chuck,means for reciprocatin the chuck between said spindle and sai magazine,means automatically operable to move the spindle toward and away fromthe nth of travel of said chuck and then bring tiie same to rest, andmeans responsive to said chuck actuating means for rendering efiectivesaid spindle operating means when said chuck has completed its stroke.

5. In combination, a receptacle, 8. revolubly mounted spindle having alongitudinal component of travel, a chuck, means for re: ciprocating thechuck between points in all nment with the spindle and the receptac e,respectively, means automatically operable to turn the spindle inopposite directions and then to stop the same, means cooperatin withsaid last-mentioned means for ren ering said chuck actuating meanseffective only when said spindle automatic means has operated to stopsaid spindle.

6. In combination, a receptacle, a revolubly mounted spindle havin alongitudinal component of travel, a chuc means for reciprocating thechuck between points in alignment with the spindle and the receptacle,respectively, means automatically operable to turn the spindle inopposite directions and then to stop the same, means cooperating withsaid last-mentioned means for rendering said chuck actuatin meanseffective when said spindle automatic means has 0 erated to stop saidspindle, and means opera Is to start said spindle automatic means whensaid chuck has made one complete forward and return movement.

7 In combination, av receptacle, a revolubly mounted spindle havin alongitudinal component of travel, a chuc means for reciprocating thechuck between points in alignment with the spindle and the receptacle,respectively, said means including a disengaging clutch, meansautomatically operable to turn the spindle in opposite directions andthen to stop the same, means for opening said clutch when said chuck hasmade one complete forward and return movement, means responsive to saidautomatic spindle means for rendering inefiective said clutch openingmeans, when said spindle automatic means has operated to stop saidspindle, and means operable to start said spindle automatic means whensaid chuck is moved into alignment with said spindle.

8. In combination, a receptacle, a revolubly mounted spindle having alongitudinal component of travel, means automaticall operable to turnthe spindle in opposite d1- rections and then to stop the same, a chuck,means for reciprocating the chuck between points in alignment with thespindle and the receptacle, respectively, said means in cluding adisengaging clutch, and mechanism automatically operable to disengagesaid clutch as the chuck moves into alignment with said spindle, tosubstantially simultaneously render cfiective said spindle ,actuatingmeans, and then, upon the stopping of the spindle to actuate said clutchto render effective said chuck actuating means.

9. In combination, a receptacle, a revolubly mounted spindle havlng alongitudinal component of travel, means automaticall means including adisengaging clutch, a-

movable member adapted to rest on said chuck reciprocating means, saidmovable member engagingsaid clutch to disengage the same only when saidchuck has moved from the spindle to the receptacle and return, mechanismhaving an effective position wherein the motion of the shaft incident tothe stopping of the spindles causes said movable member to raise out ofengagement with said clutch, and means subsequently co-acting with saidmechanism for rendering the same ineffective, causing the movable memberto drop back on said chuck reciprocating means, said mechanism againassuming an effective position when sald shaft is moved during thereversal of the direction of rotation of the spindles.

10. In combination, a receptacle, a revolubly mounted spindle having alongitudinal component of travel, means automatically operable to turnthe spindle in opposite directions and then to stop the same,

said means including a shaft adapted to be rocked as the spindle passesthrough the starting, reversing and stopping operations,

a pair of oppositely extending levers carri ed by said shaft, a chuck,means for reciprocating the chuck between points in alignment with thespindle and the receptacle, respectively, said means including a disengaging clutch, a pivotally mounted lever having an end adapted to reston said chuck reciprocating means, saidpivotally mounted lever engagingsaid clutch only when said chuck has moved into alignment with saidspindle, said pivotally mounted lever carrying a depending pivotallymounted trip levcr adapted to be actuated by one of said pair ofoppositely extending levers to move said first-mentioned pivotallymounted lever out of engagement with said clutch when said spindle isstopped, the relative arrangement of levers just mentioned constitutingan effective osition, means carried by said chuck reciprocating meansfor subsequently causing the first mentioned pivotally mounted lever todrop back on the same, said levers again assuming an effective positionwhen said shaft is moved during the 'reversal of the direction ofrotation of the spindles, and a cam carried by said chuck reciprocatingmeans for moving at least one of said first-mentioned pair of levers toefi'ect thestarting of the spindle driving means only when said chuckhas moved into alignment with said spindle.

11. In combination, a magazine, a chuck, means for causing said chuck tomove between a work-receiving position and an upcrating position andthen stop, said chuck having relatively movable jaws, a spindlepositioned in alignment with one of said chuck positions, means forturning said spindle in opposite directions and then stopping the same,means for interconnecting said first and second-mentioned means, wherebythe latter may be rendered effective to start said spindle when theformer is rendered ineffective to stop said chuck, and means for causingthe jaws of said chuck to open after the chuck has moved out ofalignment with said spindle.

12. In combination, a magazine, a chuck, means 'for causing said chuckto move through a complete forward and return stroke and then stop, saidstroke including a work-receiving position and an operating position, aspindle means for causing said spindle to have a desired stroke and thencome to rest, and means for interconnecting said first andsecond-mentioned means whereby the former may be rendered effective tostart said chuck when the latter is rendered ineffective to stop saidspindle, said chuck also having a work-releasing position.

' JOHN R. SAYLOR.

